3,5-Bis(4-methoxyphenyl)-4,5-dihydroisoxazole CAS 20821-99-2
| CAS No. | 20821-99-2 |
| Molecular Formula | C17H17NO3 |
| Molecular Weight | 283.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3,5-Bis(4-methoxyphenyl)-4,5-dihydroisoxazole (CAS 20821-99-2), a certified reference material (molecular formula C17H17NO3, MW 283.32 g/mol) for analytical method development and quality control.
Based on its molecular formula C17H17NO3, 3,5-Bis(4-methoxyphenyl)-4,5-dihydroisoxazole contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 283.32 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C17H17NO3 |
| Molecular Weight | 283.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Related Bis Standards
- 4-[(3-Methoxyphenyl)methyl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-5-one (CAS 866156-32-3)
- 4-[(3-Methoxyphenyl)methyl]-2-methyl-3,4-dihydro-2H-1,4-benzoxazin-3-one (CAS 866157-85-9)
- N-(4-Methoxyphenyl)chromane-3-carboxamide (CAS 924824-33-9)
- 1-((4-Methoxyphenyl)sulfonyl)-N,N-dimethyl-1H-tetrazol-5-amine (CAS 338417-37-1)
- 3-[2-(2-Methoxyphenyl)pyrazolo[1,5-a]pyrimidin-6-yl]propan-1-ol (CAS 893613-25-7)
- (3Z)-3-{[(4-methoxyphenyl)amino]methylidene}-1,3-dihydro-2-benzothiophen-1-one (CAS 1164461-13-5)
- (2E)-2-[(4-Methoxyphenyl)methylidene]-3,4-dihydro-2H-1,4-benzothiazin-3-one (CAS 95476-37-2)
- 2-[(2-methoxyphenyl)formamido]-4-(methylsulfanyl)butanoic acid (CAS 65054-83-3)
Recommended Standards
- 3-(Thiophene-2-sulfonamido)benzoic acid (CAS 82068-34-6)
- 3-[(4-Fluorobenzyl)oxy]-1-benzothiophene-2-carbonitrile (CAS 303985-59-3)
- 3-(Phenylsulfonamido)thiophene-2-carboxylic acid (CAS 409364-78-9)
- 3-[(4-methylphenyl)formamido]-3-phenylpropanoic acid (CAS 452347-19-2)
- 1-(Boc-amino)-2-pyrrolecarbonitrile (CAS 937046-96-3)
- 5-Bromo-N1-(4-methoxyphenyl)benzene-1,2-diamine (CAS 1416336-77-0)
- 2-((1-Phenyl-1h-tetrazol-5-yl)thio)acetic acid (CAS 46505-33-3)
- 3λ⁶-Thia-8-azabicyclo[3.2.1]octane3,3-dioxide;hydrochloride (CAS 2101562-66-5)
- (5-Bromo-4-methylpyridin-3-yl)methanol (CAS 351458-17-8)
- (6-Fluoro-5-methylpyridin-2-yl)methanamine (CAS 1256836-21-1)
- 1-Cyclopentyl-2-(phenylthio)ethan-1-one (CAS 127869-09-4)
- 6-Ethoxy-5-fluoropyridin-3-amine (CAS 886372-67-4)
- 3-Fluoroazocan-4-ol (CAS 2010092-46-1)
- Neuropeptide Y (22-36) (CAS 119019-65-7)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com